Answer:
(View Explanation)
Step-by-step explanation:
Example:
A dart is thrown at random onto a board that has the shape of a circle as shown below. Calculate the probability that the dart will hit the shaded region. (Use π = 3.142)
Solution:
Total area of board = 3.142 × 14 2 = 615.83 cm2
Area of non-shaded circle = 3.142 × 7 2 = 153.99 cm2
Area of shaded region = 615.83 – 153.99 = 461.84 cm2 = 462 cm2 (rounded to whole number)
Probability of hitting the shaded region =